Question

Which could be an example of an Adaptive Radiation?

A. a burst of new species in a new habitat where selective pressure is different from an ancestral habitat, like has been noticed for "Darwin’s Finches" The Cichlid Fishes and numerous examples from the fossil record.
B. HUMAN domestication of wild plants into crop plants due to selectively breeding plants with desirable characteristics over several hundred thousand years
C. Descent with modification and natural selection

Answer 1

Answer:

The correct answer will be option-A

Explanation:

Adaptive radiation is a process of speciation by which organisms get diversified into many forms very rapidly from an ancestral species.

The process takes place when the species gets into a new environment and new niches which results in morphological and physiological traits.

In the given question, the various forms of Darwin’s Finches on the same island is the result of adaptive radiation as the different forms of the beak of Finches is the result of different niches and the different food provided by nature.

Thus, option-A is the correct answer.

Answer 2

Answer:

A

Explanation:

Adaptional radiation- The comparatively quick evolution of the many species from one common ascendant, often happens when an organism enters a new area with lots of ecological opportunities.

EXAMPLE: "Darwin Finches".

It can also happen due to mass extinction or when new traits evolve.

Ex: Mammals after the extinction of the dinosaur.